EXCITED OH 4.7-GHZ MASERS ASSOCIATED WITH IRAS FAR-INFRARED SOURCES

被引：33

作者：

COHEN, RJ ^{[1
]}

MASHEDER, MRW ^{[1
]}

WALKER, RNF ^{[1
]}

机构：

[1] UNIV BRISTOL,DEPT PHYS,BRISTOL BS8 1TL,AVON,ENGLAND

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1991年 / 250卷 / 03期

关键词：

D O I：

10.1093/mnras/250.3.611

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A sample of 44 sources has been searched for maser emission from excited OH in the 2-PI-1/2 J = 1/2 state, in the three lines at 4765, 4750 and 4660 MHz. Most of the objects searched were taken from the large sample of powerful far-infrared sources previously searched for OH 18-cm emission by Cohen, Baart & Jonas. Nine sources were detected at 4765 MHz, including two new discoveries. Three of these sources were detected at 4750 MHz, including the first strong 4750-MHz maser, and two of the sources were detected at 4660 MHz. Strong variations were observed in four previously known 4765-MHz maser sources. The implication of these results for the excitation of OH and the pumping of OH masers is briefly discussed.

引用

页码：611 / 616

页数：6

共 27 条

[21] OH MASER EMISSION AT 4765 MHZ IN NGC 7538 (IRS1) [J].